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variety, partly to absorb animal waste, partly in the hope of naturalising them elsewhere. Covering both with wire netting extending from the roof to the floor, I filled the cages thus formed with a variety of birds. In the centre of the vessel was the machinery, occupying altogether a space of about thirty feet by twenty. The larger portion of this area was, of course, taken up by the generator, above which was the receptacle of the apergy. From this descended right through the floor a conducting bar in an antapergic sheath, so divided that without separating it from the upper portion the lower might revolve in any direction through an angle of twenty minutes (20′). This, of course, was intended to direct the stream of the repulsive force against the Sun. The angle might have been extended to thirty minutes, but that I deemed it inexpedient to rely upon a force, directed against the outer portions of the Sun's disc, believing that these are occupied by matter of density so small that it might afford no sufficient base, so to speak, for the repulsive action. It was obviously necessary also to repel or counteract the attraction of any body which might come near me during the voyage. Again, in getting free from the Earth's influence, I must be able to steer in any direction and at any angle to the surface. For this purpose I placed five smaller bars, passing through the roof and four sides, connected, like the main conductor, with the receptacle or apergion, but so that they could revolve through a much larger angle, and could at any moment be detached and insulated.

My steering apparatus consisted of a table in which were three large circles. The midmost and left hand